CWK&reg; New Replacement Laptop Notebook Battery for HP ProBook 4330s 4331s 4430s 4431s 4435s 4436s 4530s 4730s 4340s 4341s 4535s HP ProBook 4440s 4441s 4445s 4446s 633733-321 633733-151 HSTNN-IB2R HSTNN-LB2R HSTNN-XB3C LC32BA122 PR06 PR09 QK646AA QK646UT HSTNN-XB2I HSTNN-XB2N HSTNN-XB2O HSTNN-XB2R HSTNN-XB2T HSTNN-Q88C-5 HSTNN-Q8HSTNN-XB2E HSTNN-XB2F HSTNN-XB2G HSTNN-OB2T HSTNN-Q87C-4 HSTNN-Q87C-5 HSTNN-Q88C-4 HP ProBook 4431s 4435s 4436s 4540s 4545s 633805-001 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!